tag:blogger.com,1999:blog-7590176649168185428.post6719377274702460045..comments2024-03-28T18:51:21.655-04:00Comments on SolderSmoke Daily News: Arduino Repaired (well, sort of)Bill Mearahttp://www.blogger.com/profile/07662500663603350847noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-7590176649168185428.post-25889677325768141592013-04-17T04:35:16.976-04:002013-04-17T04:35:16.976-04:00Alternatively, you may have a short on the output ...Alternatively, you may have a short on the output of that opamp, overloading it (therefore it gets hot). That would mean the FET is likely blown, the LED has 1k resistor in series, so it wouldn't cause issues.Janhttps://www.blogger.com/profile/18298622484210987517noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-23362529039652204562013-04-17T04:24:10.580-04:002013-04-17T04:24:10.580-04:00Without that opamp you may have problems to power ...Without that opamp you may have problems to power the board from USB, because it drives a FET switching the USB power to the board if the external power is not applied. <br /><br />The other half of the opamp is used to drive the indicator LED on the board - that's why you have lost that capability. <br /><br />I think the chip just gave up the ghost and has a short internally.<br /><br />You can find the schematics here:<br /><a href="http://arduino.cc/en/uploads/Main/Arduino_Uno_Rev3-schematic.pdf" rel="nofollow"> Arduino Uno schematics</a>Janhttps://www.blogger.com/profile/18298622484210987517noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-26267670298509219262013-04-16T23:28:13.033-04:002013-04-16T23:28:13.033-04:00Good doings. I got one on order. The CWTD sessions...Good doings. I got one on order. The CWTD sessions convinced me. Plus one of my choreographer colleagues uses them for shows (they call 'em "dance recitals" in the parlance)...XE1GXGhttp://www.qsl.net/xe1gxgnoreply@blogger.com